From cc742dbfc41918a519dde4ecebe4a1f59e01f1c0 Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Mon, 5 Aug 2019 14:37:36 +1000
Subject: [PATCH] waf: make unused variables an error on C as well as C++
 source files

---
 Tools/ardupilotwaf/boards.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index 732d58031a..8c6b4b057d 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -118,6 +118,7 @@ class Board:
             '-Werror=shadow',
             '-Werror=return-type',
             '-Werror=unused-result',
+            '-Werror=unused-variable',
             '-Werror=narrowing',
             '-Werror=attributes',
             '-Werror=overflow',